I dug around in the forum and wasn't able to find an anwswer to this. At work I use a Dell U4320Q monitor which is a 43" 4 in 1 display. Physically it's one device but it can be electronically split into up to 4 seperate displays each with it's own input. I have it split by 4 so I can have 4 unique windows going at once or span one to whatever size I want. This allows for a tremendous amount of flexability. DisplauFusion was a god send for aligning the 4 monitors seamlessly. The one issue is that I use dark mode. "Some" windows allow me to enable a border so I can delineate the one with focus from other dark windows. Not all do. A really nice feature would be to be able to manage that screen border so it appears on all windows and can be made larger or smaller. I believe the Windows default is one or 2 pixels. My Linux system at home through KDE does this very well. Unfortunately I'm stuck using Windows at work. Is there a similar feature already in DisplayFusion or can one be added?

Thanks...

Yes that does work, but not ideally. It must be enabled for each window and if closed you must reactivate and select a color each time you open the window. The other issue I see is that the now highlighted border bleeds through if another window is moved in front. I can certainly use this but the option I was looking for was so that once enabled, all windows just get a border, OR the window with focus gets a border to define it's borders.